Olympus Outback 10x21 RC1 Binoculars

Outback 10x21 RC I Roof-prism optics and UV-protection for superb performance during all-around recreational use.   Extremely portable binoculars let you enjoy the view from virtually anywhere and conveniently fold up thanks to an innovative double-axis folding mechanism for even more compact appeal and carrying comfort. Complete with advanced optics with UV protection from harmful rays for a safe and incredibly clear viewing experience.   Features:   - High-index BaK-4 roof prisms. - Fully multi-coated lenses include aspherical elements for bright, sharp images from edge-to-edge. - Ultra-compact, foldable design. Innovative double-axis folding mechanism lets you fold the lenses into the body of the binocular making them incredibly convenient to carry in your hand or pocket. - Sleekly styled with a metallic silver finish makes them fun to use and great to look at. - UV protection reduces the transmission of harmful ultraviolet rays for safe viewing. - Twist-up eyecups let you decide your most comfortable viewing position. - Built-in dioptric correction adjusts to each user's eyesight to ensure clear viewing. - Eye-relief of 11mm provides comfortable viewing for those who wear glasses or don't. - Center focus knob is conveniently placed so your viewing experience is as easy and comfortable as you want it to be. - Lightweight (under 7 ounces).   Specifications:   Binocular Type: Roof Prism Magnification: 10x Objective Lens Diameter: 21mm Exit Pupil Diameter: 2.1 mm Real Angle of View: 5.0 degrees Apparent Angle of View: 50.0 degrees Field of View at 1000 Yards: 261 ft. Relative Brightness: 4.4 Eye Relief: 11mm Diopter Adjustment Range: Over +/- 2 m-1 Eye Interval Adjustment Range: 37-70mm Near Focus Distance: 8.2 ft. Weight: 6.9 oz. Dimensions At maximum eye interval: 4.1 (L) x 3.6 (W) x 1.6 (H) Lens Composition: 6 elements in 4 groups